Choi Won-hyeong is a South Korean voice actor born on December 5, 1968. He began his career after joining the Munhwa Broadcasting Corporation's voice acting division in 1993 as part of their 11th cohort. His work spans a wide range of media, including animated series, foreign film dubbing, and video games.

His voice acting portfolio is extensive, featuring prominent roles in numerous animated series for Korean audiences. He provided the Korean voice for Hideyuki Makimura in a television edition of City Hunter. In the anime series Erementar Gerad, he voiced the main character Coud Van Giruet. He also took on the roles of Nanashi in MÄR and Tōma Kamijō in A Certain Magical Index. According to fan resources, his other notable anime roles include Trunks in Dragon Ball GT and Kovu in The Lion King II: Simba's Pride.

Beyond animation, Choi Won-hyeong has an extensive career in dubbing foreign live-action films and series for Korean television, often providing the voice for leading actors. He is known as the regular Korean voice actor for actor Barry Pepper. His dubbing credits include replacing Paul Walker in The Fast and The Furious, Viggo Mortensen in Hidalgo, and Mark Wahlberg in The Big Hit. He also contributed narration to the long-running MBC program Surprise Mystery TV.

In the field of video games, his work is equally prolific. He voiced characters in major international titles such as Kalecgos in World of Warcraft, Bentley in the Sly Cooper series, and Marcus Damon in Digimon Masters. He also contributed to prominent Korean games, including The War of Genesis III and MapleStory.

For his work in voice acting, specifically for the series CSI: NY, he received the Best TV Voice Actor award at the 2007 MBC Drama Awards.